/Engine/Source/Runtime/Experimental/Iris/Core/Public/Iris/ReplicationState/Private/IrisFastArraySerializerInternal.h
Local edit which will modify local item without dirtying it
[FastArrayItemType](API\Runtime\IrisCore\Iris\ReplicationState\Private\TIrisFastArrayEditor\FastArrayItemTyp-) & EditLocal ( int32 ItemIdx )